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Using batch and column procedures, the present work investigated the sorption behaviour of  137 Cs and  152+154 Eu by bentonite phosphate modified with nickel (BPN) sorbent. The kinetic data obey pseudo-1 st -order for  137 Cs and follow pseudo-2 nd -order for  152+154 Eu. Various sorption isotherm models were used to analyze equilibrium data. The thermodynamic functions reflect an endothermic and spontaneous sorption process. HCl (about 95.35 %) and CaCl 2  (about 98.13 %) showed the optimum eluents for the complete recovery of both  137 Cs and  152+154 Eu, respectively. Finally, column data show that  137 Cs and  152+154 Eu may be loaded on BNP sorbent and separated from an aqueous solution using a variety of HCl concentrations as eluent. The obtianed results revealed that BNP sorbent is suitable for recovering  137 Cs and  152+154 Eu from low-level radioactive waste effluents (LLW).

radiochimica acta

Sorption behaviour of  137 Cs and  152+154 Eu onto bentonite phosphate modified with nickel: kinetics, isotherms, and chromatographic column application